As the General Manager of the Belabela Quarries outside Gaborone in Botswana, Peter Zunckel has a slightly unusual problem. Every time he tries to convince his company’s board members that budgetary provision needs to be made for replacing his fleet of three Bell B30D Articulated Dump Trucks (ADTs), he gets told that there’s nothing wrong with the existing trucks. And this is despite the oldest of the three ADTs just surpassing the magical 30 000 hour mark!